diff --git a/superset/views/core.py b/superset/views/core.py
index 18f6622c5ee7e..f71ca79be98ca 100755
--- a/superset/views/core.py
+++ b/superset/views/core.py
@@ -506,7 +506,7 @@ def pre_add(self, obj):
         obj.slug = obj.slug.strip() or None
         if obj.slug:
             obj.slug = obj.slug.replace(' ', '-')
-            obj.slug = re.sub(r'[^a-zA-Z0-9\-]+', '', obj.slug)
+            obj.slug = re.sub(r'[^a-zA-Z0-9\-_]+', '', obj.slug)
         if g.user not in obj.owners:
             obj.owners.append(g.user)
         utils.validate_json(obj.json_metadata)